There are several measures of time in use today. The basic unit of measuring time in most of the world is the second.

• There are 60 seconds in 1 minute
• There are 60 minutes in 1 hour
• There are 24 hours in 1 day
• There are 7 days in 1 week, and 365 days in one year (There are really a little under 365 and ¼, but this calculator ignores leap years).